Experienced tandem cyclists say finding the perfect partner is key to performing well. American cyclist Matt King, a visually impaired engineer, says the process is like "finding a prom date -- you court them a little bit and then you're rolling."

Cyclists are required to find pilots who perform at similar levels, says Anthony Yorke, chairman of the Cycling Sports Committee of the International Paralympic Committee.

"We want to make sure the pilot isn't too good...the blind person should be the focus of the competition," Yorke said.

Two days after McGlynn and Hunter's clear-cut victory, they received another gold of their second Paralympic trip in women's tandem cycling.

"It's like flying on the track," said McGlynn, who felt to grasp Hunter's hand after they rode across the terminal line, cheering together with the crowd the memorable win.

"We knew we could win. Also we don't want to push ourselves so much," she said, adding it meant a lot to them to defend it.

"Both of us trained really really hard over the years...But the glory today is always worthwhile," said McGlynn with bright smiles.